Title :
The effect of inertia on the mechanics of the left ventricle during the isovolumic phases
Author :
Lewkowicz, M. ; Chadwick, R.S.
Author_Institution :
Nat. Inst. of Health, Bethesda, MD, USA
Abstract :
A theory that includes the inertia of the myocardium and the blood is presented for the mechanics of the left ventricle (LV) during the isovolumic phases. The LV is modeled as a thick-walled cylinder: the myocardial material as a fluid-fiber continuum. The fibers are assumed to form an axial as well as a circumferential field and are stimulated by a time- and coordinate-dependent activation wave. The coupled hydroelastic problem is solved analytically for prescribed boundary and initial conditions. The effect of the inertial term in the equations of motion is small oscillations in measurable quantities, such as the LV pressure or the epicardial displacement
Keywords :
biomechanics; cardiology; axial field; blood inertia; circumferential field; coupled hydroelastic problem; epicardial displacement; equations of motion; fluid-fiber continuum; isovolumic phase; left ventricle mechanics; left ventricle pressure; myocardium inertia; thick-walled cylinder; Biomechanics; Biomedical engineering; Blood; Capacitive sensors; Eigenvalues and eigenfunctions; Engine cylinders; Equations; Myocardium; Optical fiber theory; Tensile stress;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95570
